Pedestal type crusher



W 1944; o. c. GRUENDER PEDESTAL TYPE CRUSHER Filed Feb. 14, 1 41 3 Sheets-Sheet 1 o. c. GRUENDER I PEDESTAL TYPE CRUSHER Fild Feb. 14; 1941 s Sheets-Sheet 2 Oct. 10, 1944. o. c. GRUENDER PEDESTAL TYPE CRUSHER Filgd. Feb. 14, 1941 3 Sheets-Sheet 3 I n 0.. m 6.

r m Q of slightly less diameter.

Patented Oct. 10, 1944 UNITED STATES PATENT OFFICE PEDESTAL TYPE CRUSHER Oscar C. Gruender, Milwaukee, Wis., assignor to Nordberg Manufacturing Company, Milwaukee, Wis, a corporation of Wisconsin Application February 14, 1941, Serial No. 378,850

12 Claims.

My invention relates to an improvement in gyratory crushers and has for one purpose the provision of a gyratory crusher which shall combine a minimum vertical height, light weight, and sturdy construction.

Another purpose is the provision of improved means for supporting a gyrated crushing head, said means reacting not only to the entire vertical crushing force, but also to a portion of the horizontal or lateral crushing force.

Another purpose is the provision of a normally fixed generally central supporting post about which the crushing head may gyrate.

Another purpose is the provision of improved oil sealing means and dust guard means for the head.

Other purposes will appear from time to time in the course of the specification and claims.

I illustrate my invention more or less diagrammatically in the accompanying drawings wherein:

Fig. l is a side elevation with part in vertical section;

Fig. 2. is a vertical axial section on a slightly larger scale;

Fig, 3 is a section on an enlarged cale along the line 3--3 of Fig. 1;

Fig. 4 is a section on the line 4-4 of Fig. 1, on an enlarged scale;

a Fig. 5 is a section on the line 55 of Fig. 2; and

Fig. 6 is a partial section of a variant form.

Like parts are indicated by like symbols throughout the specification and drawings.

Referring to the drawings, I generally indicates any suitable circumferentially extending outer frame having a bottom outwardly extending flange 2 and an upper outwardly extending flange 3, having a conic inner surface portion 4, and a rounded upper and outer surface 5, the two being eparated by a reduced or cutaway portion 6. The rounded portion 5 extends downwardly in the form of a circumferential apron 1. The flange also includes a generally horizontal portion 8, having apertures 9, the purpose of which will later appear. If desired, the interior of the flange may be more or less cored out or enlarged, as at In.

Numerals ll indicate inwardly extending radial spider portions which support an inner sleeve I3, in which may be mountedthe lower portion of a post 14. It may be secured in any suitable manner, by press fit, or otherwise. It includes an upwardly extending portion [5, herein shown as Extending upwardly and outwardly from the sleeve I3 is the housing portion l6. 7

ll indicates an eccentrically apertured sleeve which surrounds the upper post portion l5. I8 is any suitable anti-frictional bushing of bronze or the like, which may be keyed or secured to the leeve as by any suitable member IS. The sleeve 11 has secured to or formed integrally with the bottom thereof, a gear 20.

It will be observed, as in Fig. 2, that the inner face of the gear 20 overlaps and is spaced outwardly slightly away from the upper portion of the sleeve 13, the gear being provided with a definite internal bore, the clearance between it and the opposed portion of the sleeve I3 being slight but sufiicient normally to prevent bearing contact.

In the event of shaft failure, for exampl breakage of the shaft l 5, the gear 20 will immediately contact the outer surface of the sleeve i3 and prevent misalignment and consequent distortion of the gear teeth. Whenever the shaft fails, the eccentric I'i will continue to rotate, and unless means such a those above described were provided to permit rotation of the gear around the axis of the sleeve l3, failure of the gear teeth might ensue.

The sleeve I! may be supported for example upon any suitable bearing ring 2i, mounted on and preferably secured to the upper end of the sleeve 13. It may be held against rotation as by any suitable pins 22. The member 20 is shown as depending about the outside of the upper end of the sleeve I3 and is housed within the housing Hi. It may be counterweighted, as by the pocket portion 23, which may be'filld with lead, as at 24. Mounted uponthe upper edge of the housing portion I6 is a housing ring generally indicated as 25. It may be secured to the upper edge of the housing portion It, a by any suitable bolts 26. It includes an outer wall portion 21, channeled to receive a piston ring or the like 28. It includes also an inner wall portion 29, upon the top of which is mounted a spherical surfaced supporting ring 30.

3| generally indicates a head structure havin an inner bearing sleeve 32 adapted to engage the exterior of the eccentric l1. The head also is provided with a downwardly convex spherical bearing surface 33 adapted to rest upon and conform to the upwardly concave spherical bearing surface of the supporting ring 30. 34 is any suitable generally conic mantle, which may be held in position upon the outer conic face of the head 3|, as by any suitable thrust transmitting member 35 and screw threaded nut 36, which is screw threaded to the upper extension 31 of the head 3|. Anysuitable packing, for example zinc 3Ia, may be' interposed between the conic mantle 34 and the head 3|.

38 is any suitable feed limiting or distributing plate, having a generally flat upper surface and a generally conic edge portion 89. Secured to the lower outer edge of the head 3| is a ring 40, which carries at its outer edge a depending apron 4|. The ring 40 may be riveted as by rivets 42, which permit its removal from the head 3|. The ring 40 also has an inwardly extending portion 43, the lower surface of which has a downwardly convex spherical bearing surface opposed to a correspondingly surfaced portion 45 of a wiping ring 44. The wiping ring structure 44 is normally upwardly urged as by springs 46.

The lower portion of the member 44 has an inward generally cylindrical surface opposed to a piston or wiping ring 28. It also has an inward extension 41 which carries at its inner end a wiping ring 48 opposed to the generally cylin drical exterior of the member 29. The space between the members 44 and 29 constitutes a dirt receiving pocket. The member 44 is locked against rotation by any suitable locking means, for example by downwardly projecting fingers 44a which engage'a lug |6a on the housing portion I6.

In order to rotate the eccentric I1 and thus gyrate the head 3|, I employ a shaft 50, having a beveled pinion in mesh with the gear 20, and a pulley 52, from which a belt or other driving means may extend to any suitable power source not herein shown. The shaft 50 is mounted in the bearings 53, 54, located Within a surrounding sleeve 55, which is removable as a unit with the bearings and shaft. The sleeve has an outer enlargement 56, which may be bolted as by the bolts 51 to the exterior of the frame I, which is appropriately apertured to permitthis penetration.

59 indicates any suitable removable oil seal housing, the inner face of which is opposed to any suitable piston or sealing ring 60, mounted on the sleeve 8|, which is keyed to the shaft. The sleeve 6| has an outwardly extending labyrinth portion 62, which cooperates with the inward extension 83 of the housing 59, to provide a labyrinth as an additional 011 retaining means. The inner end of the sleeve 55 has an enlarged portion 64, which seals against the edges of any suitable aperture formed in the housing portion I8, and the downward extension lid of such housing portion. v

10 indicates a bowl support having a conic portion 1| conforming to the conic surface 4 of the main frame, and a portion 12 conforming to the surface 3 of the top of the main frame or its outward extending flange. The ring 1-0 is provided with apertures 18, to permit the penetration therethrough of any suitable bolts or tension members 14, which are provided with spring abutments 15, which may be adjusted as by nuts 15. The springs 11 are compressed between such abutments 15 and the horizontal portion 8.

As will appear from Fig. 3, I illustrate three sets of the bolts 14 and springs 11, in each of which six springs and bolts are shown. These are so spaced as to maintain an equalized downward thrust throughout about the circumference of the crusher.

The ring 10 has an upward generally cylindrical extension 18., having a plurality of vertical grooves 18 formed therein. It is inwardly screw threaded adjacent the top, as at 80. 8| indicates any suitable packing seated in the outer face of the upper portion thereof.

82 is an outer generally cylindrical member having an inner conic member 83, adapted to receive any suitable bowl liner 84. 85 is any suitable zinc or packing therebetween. Th member 82 is outwardly threaded, as at 85, these threads being in mesh with the threads 80 of the portion 18. It will thus appear that the member 82, when rotated, as by means of any suitable lever 81, shown in dotted line in Fig. 1, is raised or lowered, depending upon the direction of rotation. The lever or levers 81 may be received in any suitable pocket member or them. bers 88, having a lever receiving aperture 89. Downwardly extending from the top ring of the member 82 is a cylindrical shield 9|, which may be welded or otherwise secured thereto, and which extends downwardly about and in wiping contact with the sealin ring 8|, thus protecting the upper side of the'screw threads from dust or grit. The lower side is protected, for example, by any suitable sealing ring 92, received in an inner portion of the member 10 and opposed to glz e outer wall of a lower portion of the member The member 82 may be locked against rotation for example by any suitable clamp or clamps 93, of which only one is illustrated. It may be secured to the cylindrical shield 9| as by any suitable bolt 94, and includes an inwardly extending portion adapted to penetrate one of the vertical grooves or slots 19. The members" and 82 may further be locked together, and play may be prevented, as by the employment of bolts or thrust screws 96, with their appropriate iocknuts 91, shown in Fig. 2. The lower ends of these thrust; screws abut against the top of the member The rotation of the ring 10 in relation to the main frame may be prevented by the employment of pins I00, mounted in lugs I.0| on the main frame and penetrating apertured lugs I02 ouwardly extending from the ring 10, as shown in Fig. 6; or, if desired, supporting pins or shafts I03 may be employed, as shown in Figs. 1 and 2, which constitute merely upper extensions of the pins I00 of Fig. 6. These may be employed to perform the double function of preventing rotation of the ring 10 and of supporting any suitable feed platform or feed structure I04, with its inner spout I05. The feed platform I04 may be adjusted vertically along the pins I03 by any suitable sleeves I06 and nuts I01, I08, as shown in Fig. 1.

The lugs |0| may be cast integral with the apron 1 of the main frame I or, as illustrated in Figs. 1 and 2, may be secured to the apron 1 by means of bolts 0 which pass through flanges III on either side of the lugs IOI. The lugs are further provided with a downwardly projecting flange 2 to which is welded a bar III.

The springs 11 may be housed as by the employment of a circumferential cover II4, which may be formed in a plurality of sections. I illustrate, for example, the use of three sections, the

sections being secured together by means of the bars I|3 above described, which overlie the joints as illustrated in Fig. 3. Bolts 5 passing through the bars 3 and the flange 2 of the lugs IOI are screw threaded into vertical bars H6, or other suitable abutments integral with or secured, for example, by welding to the apron '1 and flange 2 of the outer frame I. Two of the housing sections are provided with flanges Ml suitably formed to straddle the bearing sleeve 55.

The bowl 8d may be mounted in any suitable manner, but I illustrate a wedging connection between it and the conic bowl support 83. I illustrate, for example, a plurality of outwardly extending lugs I20, which rest upon the tapered ledges or faces l2l at the top of the member 83. The member as is cut away as at I22 to permit the lugs 12s to be pushed in place before the bowl liner at is rotated in order to lock it.

Positioned above the bowl liner is a conical feed spout E23 provided with a cylindrical upper portion 124, which is in alignment with the spout M35 of the feed structure Hid. I25 generally indicates an oil feed line in communication with an oil duct I26 in the shaft l4, l5, and i2? is an oil return line which may be connected to any suitable oil reservoir and pump not illustrated in the drawings.

It'will be realized that, whereas I have described and illustrated a practical and operative device, nevertheless many changes may be made in the size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my description and drawings to be taken as in a broad sense illustrative or diagrammatic, rather than as limiting me to my precise showing. For example, where in the specification and claims the term generally cylindrical is employed, it will be understood that it is intended to be of suficient breadth to cover tapered or stepped bearings. The use and operation of my invention are as follows:

I find it advantageous to provide a gyratory crusher of relatively small vertical height. I therefore provide a fixed shaft M, !5, the upper portion I of which penetrates within the head 3!, and serves as a. bearing for the upward extension of the eccentric ll within the head. However, it is not desirable to support the head upon the eccentric l'l, and I therefore provide a surrounding socket bearing including the upwardly concaved spherical surfaced supporting member 30, which is opposed to a correspondingly formed lower spherical portion 33 of the head. This particular construction permits the member 30 to take a portion of the horizontal or lateral crushing force, besides sustaining the entire vertical crushing force.

Rotation of the shaft 50 and the gears 5i and results in rotation of the eccentric ill. The eccentric has a bore concentric with the axis A--A of the shaft 45, but its outer cylindrical bearing surface is inclined at an angle with respect' to its bore, and is concentric with the axis BB. These two axes intersect at point C,

as illustrated in Fig. 2, and it is around this point that the head gyrates, resulting in a larger movement at the bottom of the head than at its top.

In order to prevent breakage due to the passage of tramp iron or uncrushable material through the machine, I provide tension members, or rods It, with their accompanying compression springs 11.

I have to provide space for the drive shaft 59 and its/ associated parts, and I therefore find it desirable, in order to maintain equal moment, to divide the springs into separate groups spaced apart as shown in Fig. 3. I illustrate three groups of six springs each, but of course the number may be varied. I also find it desirable to provide a recess in the frame defined at the bottom by the flange 2 and at the top by the flange 3, which recess. may be closed by plates El i, the springs thus being concealed and protected against water and other corrosive elements, with the consequent improvement in the appearance of the machine.

In order to protect the threads 80, 86 from dust, I provide in effect a telescopic housing, the inner portion of which is provided by the member 82 and the outer portion by the welded ring 9!, the inner and outer portion moving as a unit. 92 is a dust seal between the inner portion and the bowl supporting ring 16, and M is a. dust seal between the outer portion 9| and the outer face of the upward extension 18 from the ring 10. The result is a simple, efiicient dust seal for both the top and the bottom of the adjust ing threads.

In order to lock the bowl when it is set I may employ the set screws 96, which take up play between the opposed threads and the positive locking member 93, 95, the inner portion 95 of which seats in one of the vertical grooves 19. I may employ any desired number of the members 93, 95, but three are ample. The enclosed spacing of the vertical slots or grooves [9 permits the device to be locked at any desired setting. I may prevent rotation of the bowl ring 10 on the frame either by the pins I00, screw threaded into sockets Illl, or by, the feed spout sup ports I03.

I claim:

1. In a gyratory crusher, a main frame, a generally cylindrical generally vertical pedestal upstanding therefrom and normally fixed in relation thereto, an eccentrically apertured sleeve rotatably mounted on said pedestal, and means for supporting it, said sleeve having inner and outer bearing faces, the axis of the outer face being inclined in relation to the axis of the inner, means for rotating said sleeve, an upwardly concave generally spherical bearing on said frame and located exteriorly of said pedestal and eccentric, a head surrounding said sleeve and pedestal and including a portion extending above but out of contact with the top of said pedestal, and a bearing portion conforming to the exterior hearing surface of said eccentrically apertured sleeve and parallel with the axis of the head, said head having also a generally spherical downwardly convex bearing portion resting upon the upwardly concave spherical bearing on the frame, substantially the entire weight of the head being supported upon said spherical bearing of the frame, and an oil seal exterior to said bearing portion and including a sealing ring unitary with said head and having a downwardly convex spherical bearing surface concentric with said first mentioned spherical bearing surfaces, and a vertical movable sealing ring mounted on the frame and opposed thereto, and yielding means for urging it upwardly against said sealing portion of the head.

2. In a gyratory crusher, a main frame, a pedestal upstanding therefrom and normally fixed in relation thereto, said pedestal having an exterior vertically axised bearing surface, an eccentrically apertured sleeve mounted for rotation about said pedestal, means for supporting it, and means for rotating it, said sleeve having an inner bearing surface conforming to the bearing surface of the pedestal, and an outer bearing surface the axis of which is inclined to the axis of the bearing surface of the pedestal, a crushing head surrounding said pedestal and eccentrically apertured sleeve, and having a bearing surface conforming to the exterior bearing surface of said sleeve, the axis of said bearing surface being concentric with the axis of the head, and a fixed head supporting bearing supported by said frame exterior of said pedestal and sleeve, adapted to receive substantially the entire weight of the head, and spaced radially outwardly substantially beyond said sleeve.

3. In a gyratory crusher, a main frame, a generally cylindrical generally vertical pedestal upstanding therefrom and normally fixed in relation thereto, an eccentrically apertured sleeve rotatably mounted on said pedestal, and means for supporting it, said sleeve having inner and outer bearing faces, the axis of the outer face being inclined in relation to the axis of the inner, said axes intersecting above the top of the sleeve, means for rotating said sleeve, an upwardly concave generally spherical bearing on said frame and located exteriorly of said pedestal and eccentric, a head surrounding said sleeve and pedestal and includi g a portion extending above but out of contact with the top of said pedestal, and a bearing portion conforming to the exterior bearing surface of said eccentrically apertured sleeve and parallel with the axis of the head, said head having also a generally spherical downwardly convex bearing portion resting upon the upwardly concave spherical bearing on the frame, and an oil seal exterior to said bearing portion and including a sealing ring unitary with said head and having a, downwardly convex spherical bearing surface concentric with said first mentioned spherical bearing surfaces, and a vertical movable sealing ring mounted on the frame andopposed thereto, and yielding means for urging it upwardly against said sealing portion of the head, said concave spherical bearing being adapted to receive substantially the entire weight of the head, said concave spherical bearing and sealing means being spaced radially substantially outwardly from said sleeve.

4. In a gyratory crusher, a main frame, a. pedestal upstanding therefrom and normally fixed in relation thereto, said pedestal having an exterior vertically axised bearing surface, an eccentrically apertured sleeve mounted for rotation about said pedestal, means for supporting it, and means for rotating it, said sleeve having an inner bearing surface conforming to the bearing surface of the pedestal, and an outer bearing surface the axis of which is inclined to the axis of the bearing surface of the pedestal, a crushing head surrounding said pedestal and eccentrically apertured sleeve, and having a bearing surface conforming to the exterior bearing surface of said sleeve, the axis of said bearing surface being concentric with the axis of the head, supporting means for said head located upon said frame exterior of said pedestal and sleeve adapted to receive substantially the entire vertical thrust of the head, and oil seal means exterior to said supporting means, said supporting means and oil seal means being spaced radially substantially outwardly from said sleeve.

5. In a gyratory crusher, a crusher frame, an

upstanding element on said frame having a generally cylindrical generally vertical exterior side bearing surface, an eccentrically apertured sleeve surrounding and conforming to said exterior bearing surface, and means for rotating it,"said sleeve having exterior and interior generally cylindrical bearing surfaces, the axes of which assaoa'r are inclined to each other, and intersect above the top of the sleeve, and a head having a bearing surface surrounding and conforming to the exterior bearing surface of the eccentric sleeve, supporting means for said head, including an upwardly concave spherical bearing element supported by the frame and located radially exteriorly of said eccentrically apertured sleeve, and a downwardly convex spherical bearing element conforming thereto and associated with the head, said upwardly concave spherical bearing element constituting the sole vertical support for the head.

6. In a gyratory crusher, a crusher frame, an upstanding element on said frame having a generally cylindrical generally vertical exterior side bearing surface, an eccentrically apertured sleeve surrounding and conforming to said exterior bearing surface, and means for rotating it, said sleeve having exterior and interior generally cylindrical bearing surfaces, the axes of which are inclined to each other, and a head having a bearing surface surrounding and conforming to the exterior bearing surface of the eccentric sleeve, supporting means for said head, including supported by the frame and located radially exteriorly of said eccentrically apertured sleeve and at a level intermediate the upper and the lower end thereof, and a downwardly convex spherical bearing element conforming thereto and associated with the head, said upwardly concave spherical bearing element constituting the sole vertical support for the head,

7. In a 'gyratory crusher, a crusher frame, an upstanding element on said frame having a generally cylindrical generally vertical exterior side bearing surface, an eccentrically apertured sleeve surrounding and conforming to said exterior bear. ing surface, and means for rotating it, said sleeve having exterior and interior generally cylindrical bearing surfaces, the axes of which are inclined to each other, and a head having a bearing surface surrounding and conforming to the exterior bearing surface of the eccentric sleeve, supporting means for said head, including an upwardly concave spherical bearing element supported by the frame and located exteriorly of said eccentrically apertured sleeve and at a level generally midway between the upper and lower ends of the bearing surface of the head which surrounds the exterior bearing surface of the eccentric sleeve, and a downwardly convex spherical bearing'element conforming thereto and associated with the head, said upwardly concave spherical bearing element constituting the-sole vertical support for the head.

8. In a gyratory crusher, acrusher frame, an upstanding element on said frame having a generally cylindrical generally vertical exterior side bearing surface, an eccentrically apertured sleeve surrounding and conforming to said exterior bearing surface, and means for rotating it, said sleeve having exterior and interior generally cylindrical bearing surfaces, the axes of which are inclined to each other, and a head having a bearing surface surrounding and conforming to the exterior bearing surface of the eccentric sleeve, supportextending portion having a downwardly convex spherical bearing surface concentric with the first mentioned spherical bearing surface of the head but of greater radius, and a sealing member mounted on the frame and opposed thereto.

9. In a gyratory crusher, a crusher frame, an upstanding element on said frame having a generally cylindrical generally vertical exterior side bearing surface, an eccentrically .apertured sleeve surrounding and conforming to said exterior bearing surface, and means for rotating it, said sleeve having exterior and interior generally cylindrical bearing surfaces, the axes of which are inclined to each other, and a head having a bearing surface surrounding and conforming to the exterior bearing surface of the eccentric sleeve, supporting means for said head, including an upwardly concave spherical bearing element supported by the frame and located exteriorly of said eccentrically apertured sleeve and constituting the sole vertical support for the head, and a downwardly convex spherical bearing element conforming'thereto and associated with the head, said head having a downwardly and outwardly extending portion having a downwardly convex spherical bearing surface concentric with the first mentioned spherical bearing surface of the head but of greater radius, a sealing member mounted on the frame and opposed thereto, and means for yieldingly urging said sealing member into sealing contact with said last mentioned downwardly convex spherical bearing surface.

10, In a gyrato'ry crusher, a crusher frame, an upstanding element on said frame having a generally cylindrical generally vertical exterior side bearing surface, an eccentrically apertured sleeve surrounding and conforming to said exterior bearing surface, and means for rotatingit, said sleeve having exterior and interior generally cylindrical bearing surfaces, the axes of which are inclined to each other, and intersect above the top of the sleeve, and a head having a bearing surface surrounding and conforming to the exterior bearing surface of the eccentric sleeve, supporting means for said head, including an upwardly concave spherical bearing element supported by the frame and located radially exteriorly of said eccentrically apertured sleeve, and a downwardly convex spherical bearing element conforming thereto and associated with the head, said upwardly concave spherical bearing element constituting the sole vertical support for the head, the center about which is described the spherical bearing surface of said upwardly concave bearing element being at the point of intersection of the axes of the exterior and interior bearing surfaces of the sleeve.

11. In a gyratory crusher including a main frame and a bowl portion mounted on said frame, a normally fixed shaft mounted in said main frame, said main frame having an upstanding fixed sleeve in which said shaft is mounted, an eccentrically apertured sleeve surrounding said shaft and in bearing relation therewith, and means for rotating it, and a head surrounding said eccentric sleeve and in bearing relation to the exterior thereof, supporting means for said head including an upwardly concave spherical bearing on the frame, the eccentric sleeve con-- stituting the sole means for limiting lateral movement of the head in relation to the bowl portion,

said eccentric sleeve including a portion extending downwardly about the exterior of said fixed sleeve of the main frame and being adapted, in the event of the breakage of said shaft, to contact the opposed portion of the fixed sleeve prior to damaging engagement of the head with any other part of the crusher, and to prevent substantial lateral movement of said eccentric sleeve.

12. In a gyratory crusher including a main frame and a bowl portion mounted on said main frame, a normally fixed shaft mounted in said main frame, said main frame having an upstanding fixed sleeve in which said shaft is mounted, an eccentrically apertured sleeve surrounding said shaft and in bearing relation therewith, and

means for rotating it, and a head surrounding said eccentric sleeve and in bearing relation to the exterior thereof, supporting means for said head, the eccentric sleeve constituting the sole means for limiting lateral movement of the head in relation to the bowl portion, said eccentric sleeve including a portion extending downwardly about the exterior of said fixed sleeve of the main frame and being adapted in the event of the breakage of said shaft to contact the opposed portion of the fixed sleeve prior to damaging engagement of the head with any other part of the crusher, and to prevent substantial lateral movement of said eccentric sleeve, and sealing means between a lower portion of the head and the main frame, including opposed sealing faces on head and frame, conforming to the normal path of head movement, the head being free to slide over said sealing face on the frame a distance greater than the range of movement permitted by the clearance between the eccentric sleeve and the fixed sleeve of the main frame in the event of breakage of said shaft.

OSCAR C. GRUENDER. 

